My favorite set up is a 7-bladed fixed fan on a fan clutch driven by the engine. They really seem to do the best overall job. I've got electric fans in my IROC daily driver and they work hard to keep the engine temps down. If the L98 allowed me to have a mechanical fan in the front, I would, but there's no room for that.
If you have to get an electric fan, you could get one of those high flow 4500 cfm double fans from Summit ($200 bucks) and they'll cool very well. Make sure you've got the largest alternator though, like a 140 amp or at least a 110 amp, because this fan set up uses 50 amps.
